Question

Many trees and flowers ______ in our school last year and they made our school a beautiful garden.

A．have planted	B．are planted
C．were planted	D．will be planted

Answer 1

C

考察时态及语态。句意：去年我们学校种了许多树和花草，他们让我们学校变成了一个大花园。结合语境可知前文描述的是过去发生的动作，故用一般过去时态。句子主语是动作对象，故用被动语态。选C。